45544140 has 192 divisors, whose sum is σ = 156441600. Its totient is φ = 10948608.

The previous prime is 45544133. The next prime is 45544171. The reversal of 45544140 is 4144554.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 235884 + ... + 236076.

It is an arithmetic number, because the mean of its divisors is an integer number (814800).

Almost surely, 2^45544140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45544140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78220800).

45544140 is an abundant number, since it is smaller than the sum of its proper divisors (110897460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45544140 is a wasteful number, since it uses less digits than its factorization.

45544140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 45544140 is about 6748.6398629650. The cubic root of 45544140 is about 357.1172554600.

Adding to 45544140 its reverse (4144554), we get a palindrome (49688694).

The spelling of 45544140 in words is "forty-five million, five hundred forty-four thousand, one hundred forty".